| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 2806169 |
84.3%
|
| 2 | Some difficulty | 128200 |
3.9%
|
| 3 | A lot of difficulty | 54444 |
1.6%
|
| 4 | Cannot do at all | 11659 |
0.4%
|
| 5 | Do not know | 1120 |
0%
|
| 8 | Not applicable | 325657 |
9.8%
|
| 9 | Unspecified | 1618 |
0%
|